Why Your AWS Bill Keeps Growing
Cloud infrastructure is designed to scale up easily — but scaling down requires deliberate effort. Most engineering teams are focused on shipping product, not monitoring infrastructure spend. The result is a monthly bill that grows quietly in the background.
After working with dozens of startups and mid-size companies, we consistently find the same categories of waste in almost every AWS account:
- Idle or underutilised EC2 instances running 24/7
- Unattached EBS volumes and unused snapshots
- Over-provisioned RDS database instances
- S3 buckets with no lifecycle policies
- Data transfer costs from poor architecture decisions
- Non-production environments running around the clock
Real example: A 60-person SaaS company was spending $48,000/month on AWS. After a 60-day engagement, we reduced their bill to $29,000 — a 38% reduction — without removing a single feature or degrading performance.
The 5-Step Process to Cut Your AWS Bill
Get full visibility first — use AWS Cost Explorer
Before cutting anything, understand exactly where your money is going. Enable AWS Cost Explorer and group costs by service, region, and resource tag. Most teams are surprised by what they find — often 3–4 services account for 80% of the bill.
Find and eliminate idle resources
Use AWS Trusted Advisor and AWS Compute Optimizer to identify EC2 instances running below 10% CPU utilisation, unattached EBS volumes, and idle load balancers. These are pure waste — stop or terminate them immediately.
Right-size your compute and databases
Most teams over-provision out of caution. Check your actual CPU, memory, and I/O usage over the past 30 days. Downsize instances that are consistently below 40% utilisation. For RDS, check if you can move to a smaller instance class or Aurora Serverless.
Buy Reserved Instances or Savings Plans
If you have stable, predictable workloads, Reserved Instances or Compute Savings Plans can cut those costs by 40–60% compared to on-demand pricing. Even a 1-year commitment with no upfront payment gives significant savings immediately.
Automate shutdown of non-production environments
Dev and staging environments do not need to run at nights and weekends. Use AWS Instance Scheduler or simple Lambda functions to automatically stop non-prod resources outside business hours. This alone typically saves 60–70% of non-production compute costs.
Quick Wins You Can Do This Week
If you want to start seeing savings immediately, here are actions that take less than an hour each:
- Delete unattached EBS volumes — Go to EC2 → Volumes → filter by "available" state
- Delete old snapshots — EC2 → Snapshots → sort by date and remove anything older than 90 days that is not needed
- Set S3 lifecycle rules — Move objects older than 30 days to S3 Infrequent Access, and objects older than 90 days to Glacier
- Enable AWS Budgets — Set an alert for 80% of your monthly budget so you get warned before you overspend
- Review your NAT Gateway costs — NAT Gateways are often one of the biggest hidden costs, especially if instances are sending unnecessary traffic through them
How to Keep Costs Under Control Long Term
One-time optimization is not enough. Cloud costs will creep back up unless you put governance in place. Here is what we recommend for every client:
Tagging strategy
Tag every resource with at minimum: Environment (prod/staging/dev), Team, and Project. This makes it possible to allocate costs accurately and hold teams accountable for their spend.
Monthly cost review
Set a recurring 30-minute meeting every month to review your AWS Cost Explorer report. Look for anything that has grown more than 10% month-over-month and investigate the cause before it compounds.
Budget alerts
Use AWS Budgets to set alerts at 50%, 80%, and 100% of your monthly target. Route these alerts to Slack or email so the right people are notified immediately.
Want Us to Do This For You?
We offer a free cloud audit where we analyse your AWS account and show you exactly where you are overspending — with a prioritised list of actions to fix it. No commitment required.
Book Your Free AWS Audit →